Peters



@uiten gisten gutem @frn BENJAMIN F. PERKINS, Y HOLYKE, MASSACHUSETTS.Letters PatentN. 68,897, dated September 17, 1867.

IMPROVEMENT IN STEAlili-TRAPS,l

tlgt .stimule metten tu iu 'that tttetsrttmt mit mating pnt nf its smut.'i

TO ALL WHOM IT MAY CONCERN:

Be it known that I, BENJAMIN F. PERKINS, of Holyoke, county of Hampden,and State Aot Massachusetts, have invented a new and improvedSteam-Trap, to better accomplish the discharge of air and water ofcondensation, and retain the steam in steam apparatus in general; and Ido hereby declare that the following is a full, clear, and exactdescription of the construction and operation of the same, referencebeing had to the accompanying drawings, making a part of thisspecification, in which i Figure 1 is a front elevation in section.

Figure 2, a side elevation, and

Figure 3 an elevation of the plates, representing. the form they take onbecoming heated and expanded.

The same letters indicate like parts in each of the figures. l

My invention consists in the construction and arrangement of parts asherein described. C and C are'the outside case, of any convenient form,the two parts being screwed or bolted together. i A is the inlet, and Bthe outlet; D 'is a valve, made in any of the known "forms, but Iprcfera three-winged valve, as represented, for closing the inlet A. E1-2-3-4 are compound plates made of two unequal-expanding metals, asbrass and steel, these being the cheapest and most durable, the twobeing closely fitted and riveted together and arranged us follows: E 1with the brass side up, E 2 with the brass side down, with thebrass'silde up, E 4 with the brass side down. I and I are ribs on theinsid'e of the case C', to prevent lateral-motion of the plates E-andprevent their being displaced in any Way. G is a spindle passing throughthe bottom of case C, with a valveshaped shoulder, as at J, fig. l, toprevent leakage. On the top of G is a nut, F, with flanges on two sidestoenvelop E 4, and prevent the nut F from revolving when the spindle Gis turned. H is u nut ou the low-er end of spindle G, on the outside ofcase C', to fasten the spindle G in any position required. VThe lowerend of spindle G is squared to receive a wrench for turning. the same.

Having fully described the construction of my trap, the operation is asfollows; When theplates'E 1-2- 3-4 are cool the valve D is always open,so that air and water of condensation can freely pass through, but onthe approach of steam the plates E 1 2-3-1 become heated and take theform as represented in iig. 3, E 1-2-3-4, the brass taking the convex,and the steel the concave form in all cases. This closes the valve D7preventing the further egress of steam. Turning the spindleG will raisethe nut F; that raising the plates E 1-2-34 will adjust the valve D, sothat the water of condensation can be `passed from the trap `at anytemperature.

The advantage of this arrangement is a very compacncheap, durable, and4eicient trap; when not in use always open; readily adjusted when inoperation; not aiected by the frost; when properly adjusted the nut Hwill retain it in that position. With this arrangement of plates, I amenabled to make a very compact trap, with unlimited power, action, andcapacity, thps combining many good qualities.

Having fully described my invention, its construction and operation,what I claim as new, and desire to secure by Letters Patent, isi 1. Iclaim a steam-trap operated by two or more compound plates, so arrangedthat the expansion or contraction of one is conveyed to'the second, andof those two to the third and last and valve' D, as represented at 2.Also the spindle G and nuts Fand H, the whole4 arranged and combined asherein described and forithe purpose specified. t

n. F. PERKINS.

Witnesses:

S. F. BARRETT, Gnarls Moons,

